IServiceContainer インターフェイスの単純な実装を提供します。このクラスは継承できません。
この型のすべてのメンバの一覧については、ServiceContainer メンバ を参照してください。
System.Object
System.ComponentModel.Design.ServiceContainer
NotInheritable Public Class ServiceContainer
Implements IServiceContainer, IServiceProvider
[C#]
public sealed class ServiceContainer : IServiceContainer,
IServiceProvider
[C++]
public __gc __sealed class ServiceContainer : public
IServiceContainer, IServiceProvider
[JScript]
public class ServiceContainer implements IServiceContainer,
IServiceProvider
スレッドセーフ
この型の public static (Visual Basicでは Shared) のすべてのメンバは、マルチスレッド操作で安全に使用できます。インスタンスのメンバの場合は、スレッドセーフであるとは限りません。
解説
ServiceContainer オブジェクトを使用して、サービスを格納および提供できます。 ServiceContainer は、 IServiceContainer インターフェイスを実装します。
ServiceContainer オブジェクトは、親の IServiceContainer を追加するコンストラクタを使用して作成できます。これを通じてサービスは、直接の親である IServiceContainer を含む、すべての親 IServiceContainer オブジェクトを必要に応じて追加または削除できます。親であることを使用して、この IServiceContainer にリンクするすべての IServiceContainer 実装に対してサービスを追加または削除するには、サービス要求を昇格させるかどうかを示す Boolean 値を受け取る AddService または RemoveService のメソッド オーバーロードを呼び出します。
使用例
[Visual Basic, C#, C++] サービス チェインの流れと、リンクされた ServiceContainer オブジェクトのチェインにおけるサービスの可用性を示すプログラムの例を次に示します。この例のプログラムでは、リンクされたサービスのチェイン内におけるサービスの可用性を確認できるユーザー インターフェイスを提供します。また、 AddService 、 GetService 、 RemoveService の各メソッドとリンクされたサービス コンテナを使用しています。
Imports System
Imports System.Drawing
Imports System.Collections
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Windows.Forms
Imports System.Windows.Forms.Design
' Example form provides UI for demonstrating service sharing behavior
' of a network of IServiceContainer/IServiceProvider controls.
Public Class ServiceForm
Inherits System.Windows.Forms.Form
' Root service container control for tree.
Private root As ServiceObjectControl
' Button for clearing any provided services and resetting tree states.
Private WithEvents reset_button As System.Windows.Forms.Button
' Color list used to color code controls.
Private colorkeys() As Color
' Strings used to reflect text service.
Private keystrings() As String
Public Sub New()
InitializeComponent()
CreateServiceControlTree()
colorkeys = New Color() {Color.Beige, Color.SeaShell, Color.LightGreen, Color.LightBlue, Color.Khaki, Color.CadetBlue}
keystrings = New String() {"No service use", "Service not accessible", "Service provided", "Service obtained", "Service accessible", "No further access"}
End Sub
Private Sub CreateServiceControlTree()
' Create root service control.
Dim control1 As New ServiceObjectControl(Nothing, New Size(300, 40), New Point(10, 80), Me)
root = control1
' Create first tier - pass parent with service object control 1
Dim control2 As New ServiceObjectControl(control1, New Size(200, 30), New Point(50, 160), Me)
Dim control3 As New ServiceObjectControl(control1, New Size(200, 30), New Point(50, 240), Me)
' Create second tier A - pass parent with service object control 2
Dim control4 As New ServiceObjectControl(control2, New Size(180, 20), New Point(300, 145), Me)
Dim control5 As New ServiceObjectControl(control2, New Size(180, 20), New Point(300, 185), Me)
' Create second tier B - pass parent with service object control 3
Dim control6 As New ServiceObjectControl(control3, New Size(180, 20), New Point(300, 225), Me)
Dim control7 As New ServiceObjectControl(control3, New Size(180, 20), New Point(300, 265), Me)
' Add controls.
Me.Controls.AddRange(New Control() {control1, control2, control3, control4, control5, control6, control7})
End Sub
Public Sub ResetServiceTree(ByVal sender As Object, ByVal e As EventArgs) Handles reset_button.Click
' Remove the service from the service tree.
If Not (root.serviceContainer.GetService(GetType(TextService)) Is Nothing) Then
root.serviceContainer.RemoveService(GetType(TextService), True)
End If
' Set all controls to "not obtained" and clear their labels.
Dim i As Integer
For i = 0 To Controls.Count - 1
If Not Controls(i).Equals(reset_button) Then
CType(Controls(i), ServiceObjectControl).state = TextServiceState.ServiceNotObtained
CType(Controls(i), ServiceObjectControl).label = String.Empty
CType(Controls(i), ServiceObjectControl).BackColor = Color.Beige
End If
Next i
End Sub
Public Sub UpdateServiceCoverage()
' Have each control set state to reflect service availability.
Dim i As Integer
For i = 0 To Controls.Count - 1
If Not Controls(i).Equals(reset_button) Then
CType(Controls(i), ServiceObjectControl).ReflectServiceVisibility()
End If
Next i
End Sub
Private Sub InitializeComponent()
Me.reset_button = New System.Windows.Forms.Button()
Me.SuspendLayout()
'
'reset_button
'
Me.reset_button.Location = New System.Drawing.Point(392, 88)
Me.reset_button.Name = "reset_button"
Me.reset_button.TabIndex = 0
Me.reset_button.TabStop = False
Me.reset_button.Text = "Reset"
'
'ServiceForm
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(512, 373)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.reset_button})
Me.MinimumSize = New System.Drawing.Size(520, 400)
Me.Name = "ServiceForm"
Me.Text = "Service Container Architecture Example"
Me.ResumeLayout(False)
End Sub
<STAThread()> _
Shared Sub Main()
Application.Run(New ServiceForm())
End Sub
Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
e.Graphics.DrawString("The following tree diagram represents a hierarchy of linked service containers in controls.", New Font("Arial", 9), New SolidBrush(Color.Black), 4, 4)
e.Graphics.DrawString("This example demonstrates the propagation behavior of services through a linked service object tree.", New Font("Arial", 8), New SolidBrush(Color.Black), 4, 26)
e.Graphics.DrawString("Right-click a component to add or replace a text service, or to remove it if the component provided it.", New Font("Arial", 8), New SolidBrush(Color.Black), 4, 38)
e.Graphics.DrawString("Left-click a component to update text from the text service if available.", New Font("Arial", 8), New SolidBrush(Color.Black), 4, 50)
' Draw lines to represent tree branches.
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 20, 125, 20, 258)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 21, 175, 45, 175)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 21, 258, 45, 258)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 255, 175, 285, 175)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 255, 258, 285, 258)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 285, 155, 285, 195)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 285, 238, 285, 278)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 285, 155, 290, 155)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 285, 195, 290, 195)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 285, 238, 290, 238)
e.Graphics.DrawLine(New Pen(New SolidBrush(Color.Black), 1), 285, 278, 290, 278)
' Draw color key.
e.Graphics.DrawRectangle(New Pen(New SolidBrush(Color.Black), 1), 20, 305, 410, 60)
Dim y As Integer = 0
Dim i As Integer
For i = 0 To 2
e.Graphics.FillRectangle(New SolidBrush(colorkeys(y)), 25 + i * 140, 310, 20, 20)
e.Graphics.DrawRectangle(New Pen(New SolidBrush(Color.Black), 1), 25 + i * 140, 310, 20, 20)
e.Graphics.DrawString(keystrings(y), New Font("Arial", 8), New SolidBrush(Color.Black), 50 + i * 140, 315)
y += 1
e.Graphics.FillRectangle(New SolidBrush(colorkeys(y)), 25 + i * 140, 340, 20, 20)
e.Graphics.DrawRectangle(New Pen(New SolidBrush(Color.Black), 1), 25 + i * 140, 340, 20, 20)
e.Graphics.DrawString(keystrings(y), New Font("Arial", 8), New SolidBrush(Color.Black), 50 + i * 140, 345)
y += 1
Next i
End Sub
End Class
' An example user control that uses ServiceContainer to add, remove,
' and access services through a linkable service container network.
Public Class ServiceObjectControl
Inherits System.Windows.Forms.UserControl
' This example user control implementation provides a wrapper for
' ServiceContainer, supporting a linked service container network.
Public serviceContainer As serviceContainer
' Parent form reference for main program function access.
Private parentserviceForm As ServiceForm
' String for label displayed on the control to indicate the
' control's current service-related configuration state.
Public label As String
' The current state of the control reflecting whether it has
' obtained or provided a text service.
Private state_ As TextServiceState
Public Property state() As TextServiceState
Get
Return state_
End Get
Set(ByVal Value As TextServiceState)
If CType(Value, TextServiceState) = TextServiceState.ServiceProvided Then
Me.BackColor = Color.LightGreen
ElseIf CType(Value, TextServiceState) = TextServiceState.ServiceNotObtained Then
Me.BackColor = Color.White
ElseIf CType(Value, TextServiceState) = TextServiceState.ServiceObtained Then
Me.BackColor = Color.LightBlue
ElseIf CType(Value, TextServiceState) = TextServiceState.ServiceNotFound Then
Me.BackColor = Color.SeaShell
End If
state_ = Value
End Set
End Property
Public Sub New(ByVal serviceContainerParent As ServiceObjectControl, ByVal size As Size, ByVal ___location As Point, ByVal parent As ServiceForm)
Me.state_ = TextServiceState.ServiceNotObtained
Me.BackColor = Color.Beige
Me.label = String.Empty
Me.Size = size
Me.Location = ___location
Me.parentserviceForm = parent
If serviceContainerParent Is Nothing Then
serviceContainer = New ServiceContainer()
Else
serviceContainer = New ServiceContainer(serviceContainerParent.serviceContainer)
End If
End Sub
' Paint method override draws the label string on the control.
Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
e.Graphics.DrawString(label, New Font("Arial", 8), New SolidBrush(Color.Black), 5, 5)
End Sub
' Process mouse-down behavior for click.
Protected Overrides Sub OnMouseDown(ByVal e As System.Windows.Forms.MouseEventArgs)
If e.Button = MouseButtons.Left Then
If state_ <> TextServiceState.ServiceProvided Then
' Attempt to update text from service, and set color
' state accordingly.
Dim ts As TextService = CType(serviceContainer.GetService(GetType(TextService)), TextService)
If Not (ts Is Nothing) Then
Me.label = ts.text
state = TextServiceState.ServiceObtained
Else
Me.label = "Service Not Found"
state = TextServiceState.ServiceNotFound
End If
End If
End If
If e.Button = MouseButtons.Right Then
If state_ = TextServiceState.ServiceProvided Then
' Remove service if the container provided it.
If Not (serviceContainer.GetService(GetType(TextService)) Is Nothing) Then
serviceContainer.RemoveService(GetType(TextService), True)
state = TextServiceState.ServiceNotObtained
Me.label = "Service Removed"
End If
Else
' Obtain string and provide text service.
Dim form As New StringInputDialog("Test String")
form.StartPosition = FormStartPosition.CenterParent
If form.ShowDialog() = DialogResult.OK Then
If Not (serviceContainer.GetService(GetType(TextService)) Is Nothing) Then
serviceContainer.RemoveService(GetType(TextService), True)
End If
parentserviceForm.ResetServiceTree(Me, New EventArgs())
serviceContainer.AddService(GetType(TextService), New TextService(form.inputTextBox.Text), True)
state = TextServiceState.ServiceProvided
Me.label = "Provided Text: " + form.inputTextBox.Text
End If
End If
End If
parentserviceForm.UpdateServiceCoverage()
End Sub
' Method accesses the TextService to test the visibility of the service
' from the control, and sets the UI state accordingly.
Public Sub ReflectServiceVisibility()
If state_ = TextServiceState.ServiceObtained Then
If serviceContainer.GetService(GetType(TextService)) Is Nothing Then
Me.BackColor = Color.CadetBlue
End If
ElseIf state_ <> TextServiceState.ServiceProvided Then
If serviceContainer.GetService(GetType(TextService)) Is Nothing Then
Me.BackColor = Color.White
Return
End If
' Service available.
If state_ = TextServiceState.ServiceNotFound Then
Me.BackColor = Color.Khaki
ElseIf state_ = TextServiceState.ServiceNotObtained AndAlso label <> "Service Removed" Then
Me.BackColor = Color.Khaki
End If
End If
End Sub
End Class
' Example service type contains a text string, sufficient
' for use to demonstrate service sharing.
Public Class TextService
Public [text] As String
Public Sub New()
MyClass.New(String.Empty)
End Sub
Public Sub New(ByVal [text] As String)
Me.text = [text]
End Sub
End Class
Public Enum TextServiceState
ServiceNotObtained
ServiceObtained
ServiceProvided
ServiceNotFound
End Enum
' Example Form for entering a string.
Friend Class StringInputDialog
Inherits System.Windows.Forms.Form
Private ok_button As System.Windows.Forms.Button
Private cancel_button As System.Windows.Forms.Button
Public inputTextBox As System.Windows.Forms.TextBox
Public Sub New(ByVal [text] As String)
InitializeComponent()
inputTextBox.Text = [text]
End Sub
Private Sub InitializeComponent()
Me.ok_button = New System.Windows.Forms.Button()
Me.cancel_button = New System.Windows.Forms.Button()
Me.inputTextBox = New System.Windows.Forms.TextBox()
Me.SuspendLayout()
Me.ok_button.Anchor = System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right
Me.ok_button.Location = New System.Drawing.Point(180, 43)
Me.ok_button.Name = "ok_button"
Me.ok_button.TabIndex = 1
Me.ok_button.Text = "OK"
Me.ok_button.DialogResult = System.Windows.Forms.DialogResult.OK
Me.cancel_button.Anchor = System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right
Me.cancel_button.Location = New System.Drawing.Point(260, 43)
Me.cancel_button.Name = "cancel_button"
Me.cancel_button.TabIndex = 2
Me.cancel_button.Text = "Cancel"
Me.cancel_button.DialogResult = System.Windows.Forms.DialogResult.Cancel
Me.inputTextBox.Location = New System.Drawing.Point(6, 9)
Me.inputTextBox.Name = "inputTextBox"
Me.inputTextBox.Size = New System.Drawing.Size(327, 20)
Me.inputTextBox.TabIndex = 0
Me.inputTextBox.Text = ""
Me.inputTextBox.Anchor = System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(342, 73)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.inputTextBox, Me.cancel_button, Me.ok_button})
Me.MinimumSize = New System.Drawing.Size(350, 100)
Me.Name = "StringInputDialog"
Me.Text = "Text Service Provide String Dialog"
Me.ResumeLayout(False)
End Sub
End Class
[C#]
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Windows.Forms;
using System.Windows.Forms.Design;
namespace ServiceArchitectureExample
{
// Example form provides UI for demonstrating service sharing behavior
// of a network of IServiceContainer/IServiceProvider controls.
public class ServiceForm : System.Windows.Forms.Form
{
// Root service container control for tree.
private ServiceObjectControl root;
// Button for clearing any provided services and resetting tree states.
private System.Windows.Forms.Button reset_button;
// Color list used to color code controls.
private Color[] colorkeys;
// Strings used to reflect text service.
private string[] keystrings;
public ServiceForm()
{
InitializeComponent();
CreateServiceControlTree();
colorkeys = new Color[] { Color.Beige, Color.SeaShell, Color.LightGreen, Color.LightBlue, Color.Khaki, Color.CadetBlue };
keystrings = new string[] { "No service use", "Service not accessible", "Service provided", "Service obtained", "Service accessible", "No further access" };
}
private void CreateServiceControlTree()
{
// Create root service control.
ServiceObjectControl control1 = new ServiceObjectControl(null, new Size(300, 40), new Point(10, 80), this);
root = control1;
// Create first tier - pass parent with service object control 1
ServiceObjectControl control2 = new ServiceObjectControl(control1, new Size(200, 30), new Point(50, 160), this);
ServiceObjectControl control3 = new ServiceObjectControl(control1, new Size(200, 30), new Point(50, 240), this);
// Create second tier A - pass parent with service object control 2
ServiceObjectControl control4 = new ServiceObjectControl(control2, new Size(180, 20), new Point(300, 145), this);
ServiceObjectControl control5 = new ServiceObjectControl(control2, new Size(180, 20), new Point(300, 185), this);
// Create second tier B - pass parent with service object control 3
ServiceObjectControl control6 = new ServiceObjectControl(control3, new Size(180, 20), new Point(300, 225), this);
ServiceObjectControl control7 = new ServiceObjectControl(control3, new Size(180, 20), new Point(300, 265), this);
// Add controls.
this.Controls.AddRange( new Control[] { control1, control2, control3, control4, control5, control6, control7 } );
}
public void ResetServiceTree(object sender, EventArgs e)
{
// Remove the service from the service tree.
if( root.serviceContainer.GetService(typeof(TextService)) != null )
root.serviceContainer.RemoveService(typeof(TextService), true);
// Set all controls to "not obtained" and clear their labels.
for( int i=0; i<Controls.Count; i++ )
if( !Controls[i].Equals(reset_button) )
{
((ServiceObjectControl)Controls[i]).state = TextServiceState.ServiceNotObtained;
((ServiceObjectControl)Controls[i]).label = string.Empty;
((ServiceObjectControl)Controls[i]).BackColor = Color.Beige;
}
}
public void UpdateServiceCoverage()
{
// Have each control set state to reflect service availability.
for( int i=0; i<Controls.Count; i++ )
if( !Controls[i].Equals(reset_button) )
((ServiceObjectControl)Controls[i]).ReflectServiceVisibility();
}
#region Windows Form Designer generated code
private void InitializeComponent()
{
this.reset_button = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// reset_button
//
this.reset_button.Location = new System.Drawing.Point(392, 88);
this.reset_button.Name = "reset_button";
this.reset_button.TabIndex = 0;
this.reset_button.TabStop = false;
this.reset_button.Text = "Reset";
this.reset_button.Click += new System.EventHandler(this.ResetServiceTree);
//
// ServiceForm
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(512, 373);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.reset_button});
this.MinimumSize = new System.Drawing.Size(520, 400);
this.Name = "ServiceForm";
this.Text = "Service Container Architecture Example";
this.ResumeLayout(false);
}
#endregion
[STAThread]
static void Main()
{
Application.Run(new ServiceForm());
}
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
e.Graphics.DrawString("The following tree diagram represents a hierarchy of linked service containers in controls.", new Font("Arial", 9), new SolidBrush(Color.Black), 4, 4);
e.Graphics.DrawString("This example demonstrates the propagation behavior of services through a linked service object tree.", new Font("Arial", 8), new SolidBrush(Color.Black), 4, 26);
e.Graphics.DrawString("Right-click a component to add or replace a text service, or to remove it if the component provided it.", new Font("Arial", 8), new SolidBrush(Color.Black), 4, 38);
e.Graphics.DrawString("Left-click a component to update text from the text service if available.", new Font("Arial", 8), new SolidBrush(Color.Black), 4, 50);
// Draw lines to represent tree branches.
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 20, 125, 20, 258);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 21, 175, 45, 175);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 21, 258, 45, 258);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 255, 175, 285, 175);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 255, 258, 285, 258);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 285, 155, 285, 195);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 285, 238, 285, 278);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 285, 155, 290, 155);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 285, 195, 290, 195);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 285, 238, 290, 238);
e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 1), 285, 278, 290, 278);
// Draw color key.
e.Graphics.DrawRectangle(new Pen(new SolidBrush(Color.Black), 1), 20, 305, 410, 60);
int y=0;
for( int i=0; i<3; i++ )
{
e.Graphics.FillRectangle(new SolidBrush(colorkeys[y]), 25+(i*140), 310, 20, 20);
e.Graphics.DrawRectangle(new Pen(new SolidBrush(Color.Black), 1), 25+(i*140), 310, 20, 20);
e.Graphics.DrawString(keystrings[y], new Font("Arial", 8), new SolidBrush(Color.Black), 50+(i*140), 315);
y++;
e.Graphics.FillRectangle(new SolidBrush(colorkeys[y]), 25+(i*140), 340, 20, 20);
e.Graphics.DrawRectangle(new Pen(new SolidBrush(Color.Black), 1), 25+(i*140), 340, 20, 20);
e.Graphics.DrawString(keystrings[y], new Font("Arial", 8), new SolidBrush(Color.Black), 50+(i*140), 345);
y++;
}
}
}
// An example user control that uses ServiceContainer to add, remove,
// and access services through a linkable service container network.
public class ServiceObjectControl : System.Windows.Forms.UserControl
{
// This example user control implementation provides a wrapper for
// ServiceContainer, supporting a linked service container network.
public ServiceContainer serviceContainer;
// Parent form reference for main program function access.
private ServiceForm parent;
// String for label displayed on the control to indicate the
// control's current service-related configuration state.
public string label;
// The current state of the control reflecting whether it has
// obtained or provided a text service.
private TextServiceState state_;
public TextServiceState state
{
get
{
return state_;
}
set
{
if( (TextServiceState)value == TextServiceState.ServiceProvided )
this.BackColor = Color.LightGreen;
else if( (TextServiceState)value == TextServiceState.ServiceNotObtained )
this.BackColor = Color.White;
else if( (TextServiceState)value == TextServiceState.ServiceObtained )
this.BackColor = Color.LightBlue;
else if( (TextServiceState)value == TextServiceState.ServiceNotFound )
this.BackColor = Color.SeaShell;
state_ = value;
}
}
public ServiceObjectControl(ServiceObjectControl serviceContainerParent, Size size, Point ___location, ServiceForm parent)
{
this.state_ = TextServiceState.ServiceNotObtained;
this.BackColor = Color.Beige;
this.label = string.Empty;
this.Size = size;
this.Location = ___location;
this.parent = parent;
if( serviceContainerParent == null )
serviceContainer = new ServiceContainer();
else
serviceContainer = new ServiceContainer(serviceContainerParent.serviceContainer);
}
// Paint method override draws the label string on the control.
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
e.Graphics.DrawString(label, new Font("Arial", 8), new SolidBrush(Color.Black), 5, 5);
}
// Process mouse-down behavior for click.
protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
{
if( e.Button == MouseButtons.Left )
{
if( state_ != TextServiceState.ServiceProvided )
{
// Attempt to update text from service, and set color
// state accordingly.
TextService ts = (TextService)serviceContainer.GetService(typeof(TextService));
if( ts != null )
{
this.label = ts.text;
state = TextServiceState.ServiceObtained;
}
else
{
this.label = "Service Not Found";
state = TextServiceState.ServiceNotFound;
}
}
}
if( e.Button == MouseButtons.Right )
{
if( state_ == TextServiceState.ServiceProvided )
{
// Remove service if the container provided it.
if( serviceContainer.GetService(typeof(TextService)) != null )
{
serviceContainer.RemoveService(typeof(TextService), true);
state = TextServiceState.ServiceNotObtained;
this.label = "Service Removed";
}
}
else
{
// Obtain string and provide text service.
StringInputDialog form = new StringInputDialog("Test String");
form.StartPosition = FormStartPosition.CenterParent;
if( form.ShowDialog() == DialogResult.OK )
{
if( serviceContainer.GetService(typeof(TextService)) != null )
serviceContainer.RemoveService(typeof(TextService), true);
parent.ResetServiceTree(this, new EventArgs());
serviceContainer.AddService(typeof(TextService), new TextService( form.inputTextBox.Text ), true);
state = TextServiceState.ServiceProvided;
this.label = "Provided Text: "+form.inputTextBox.Text;
}
}
}
parent.UpdateServiceCoverage();
}
// Method accesses the TextService to test the visibility of the service
// from the control, and sets the UI state accordingly.
public void ReflectServiceVisibility()
{
if( state_ == TextServiceState.ServiceObtained )
{
if( serviceContainer.GetService(typeof(TextService)) == null )
this.BackColor = Color.CadetBlue;
}
else if( state_ != TextServiceState.ServiceProvided )
{
if( serviceContainer.GetService(typeof(TextService)) == null )
{
this.BackColor = Color.White;
return;
}
// Service available.
if( state_ == TextServiceState.ServiceNotFound )
this.BackColor = Color.Khaki;
else if( state_ == TextServiceState.ServiceNotObtained && label != "Service Removed" )
this.BackColor = Color.Khaki;
}
}
}
// Example service type contains a text string, sufficient
// to demonstrate service sharing.
public class TextService
{
public string text;
public TextService() : this(string.Empty)
{
}
public TextService(string text)
{
this.text = text;
}
}
public enum TextServiceState
{
ServiceNotObtained,
ServiceObtained,
ServiceProvided,
ServiceNotFound
}
// Example Form for entering a string.
internal class StringInputDialog : System.Windows.Forms.Form
{
private System.Windows.Forms.Button ok_button;
private System.Windows.Forms.Button cancel_button;
public System.Windows.Forms.TextBox inputTextBox;
public StringInputDialog(string text)
{
InitializeComponent();
inputTextBox.Text = text;
}
private void InitializeComponent()
{
this.ok_button = new System.Windows.Forms.Button();
this.cancel_button = new System.Windows.Forms.Button();
this.inputTextBox = new System.Windows.Forms.TextBox();
this.SuspendLayout();
this.ok_button.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right);
this.ok_button.Location = new System.Drawing.Point(180, 43);
this.ok_button.Name = "ok_button";
this.ok_button.TabIndex = 1;
this.ok_button.Text = "OK";
this.ok_button.DialogResult = System.Windows.Forms.DialogResult.OK;
this.cancel_button.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right);
this.cancel_button.Location = new System.Drawing.Point(260, 43);
this.cancel_button.Name = "cancel_button";
this.cancel_button.TabIndex = 2;
this.cancel_button.Text = "Cancel";
this.cancel_button.DialogResult = System.Windows.Forms.DialogResult.Cancel;
this.inputTextBox.Location = new System.Drawing.Point(6, 9);
this.inputTextBox.Name = "inputTextBox";
this.inputTextBox.Size = new System.Drawing.Size(327, 20);
this.inputTextBox.TabIndex = 0;
this.inputTextBox.Text = "";
this.inputTextBox.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right);
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(342, 73);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.inputTextBox,
this.cancel_button,
this.ok_button});
this.MinimumSize = new System.Drawing.Size(350, 100);
this.Name = "StringInputDialog";
this.Text = "Text Service Provide String Dialog";
this.ResumeLayout(false);
}
}
}
[C++]
#using <mscorlib.dll>
#using <System.Windows.Forms.dll>
#using <System.dll>
#using <System.Drawing.dll>
using namespace System;
using namespace System::Drawing;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Windows::Forms;
using namespace System::Windows::Forms::Design;
public __gc class ServiceObjectControl;
// Example form provides UI for demonstrating service sharing behavior
// of a network of IServiceContainer/IServiceProvider controls.
public __gc class ServiceForm : public System::Windows::Forms::Form
{
// Root service container control for tree.
private:
ServiceObjectControl* root;
// Button for clearing any provided services and resetting tree states.
System::Windows::Forms::Button* reset_button;
// Color list used to color code controls.
Color colorkeys[];
// Strings used to reflect text service.
String* keystrings[];
public:
ServiceForm()
{
InitializeComponent();
CreateServiceControlTree();
colorkeys = new Color[6];
colorkeys[0] = Color::Beige;
colorkeys[1] = Color::SeaShell;
colorkeys[2] = Color::LightGreen;
colorkeys[3] = Color::LightBlue;
colorkeys[4] = Color::Khaki;
colorkeys[5] = Color::CadetBlue;
String* stringstemp[] = { S"No service use", S"Service not accessible", S"Service provided", S"Service obtained", S"Service accessible", S"No further access" };
keystrings = stringstemp;
}
private:
void CreateServiceControlTree();
void InitializeComponent();
public:
void ResetServiceTree(Object* sender, EventArgs* e);
void UpdateServiceCoverage();
protected:
void OnPaint(System::Windows::Forms::PaintEventArgs* e);
};
// Example service type contains a text string, sufficient
// to demonstrate service sharing.
public __gc class TextService
{
public:
String* text;
TextService() : text(String::Empty)
{
}
TextService(String* text)
{
this->text = text;
}
};
public __value enum TextServiceState
{
ServiceNotObtained,
ServiceObtained,
ServiceProvided,
ServiceNotFound
};
// Example Form for entering a string.
private __gc class StringInputDialog : public System::Windows::Forms::Form
{
private:
System::Windows::Forms::Button* ok_button;
System::Windows::Forms::Button* cancel_button;
public:
System::Windows::Forms::TextBox* inputTextBox;
StringInputDialog(String* text)
{
InitializeComponent();
inputTextBox->Text = text;
}
private:
void InitializeComponent()
{
this->ok_button = new System::Windows::Forms::Button();
this->cancel_button = new System::Windows::Forms::Button();
this->inputTextBox = new System::Windows::Forms::TextBox();
this->SuspendLayout();
this->ok_button->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Right);
this->ok_button->Location = System::Drawing::Point(180, 43);
this->ok_button->Name = S"ok_button";
this->ok_button->TabIndex = 1;
this->ok_button->Text = S"OK";
this->ok_button->DialogResult = System::Windows::Forms::DialogResult::OK;
this->cancel_button->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Right);
this->cancel_button->Location = System::Drawing::Point(260, 43);
this->cancel_button->Name = S"cancel_button";
this->cancel_button->TabIndex = 2;
this->cancel_button->Text = S"Cancel";
this->cancel_button->DialogResult = System::Windows::Forms::DialogResult::Cancel;
this->inputTextBox->Location = System::Drawing::Point(6, 9);
this->inputTextBox->Name = S"inputTextBox";
this->inputTextBox->Size = System::Drawing::Size(327, 20);
this->inputTextBox->TabIndex = 0;
this->inputTextBox->Text = S"";
this->inputTextBox->Anchor = static_cast<AnchorStyles>((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Left)
| System::Windows::Forms::AnchorStyles::Right);
this->AutoScaleBaseSize = System::Drawing::Size(5, 13);
this->ClientSize = System::Drawing::Size(342, 73);
System::Windows::Forms::Control* temp0 [] = {this->inputTextBox,
this->cancel_button,
this->ok_button};
this->Controls->AddRange(temp0);
this->MinimumSize = System::Drawing::Size(350, 100);
this->Name = S"StringInputDialog";
this->Text = S"Text Service Provide String Dialog";
this->ResumeLayout(false);
}
};
// An example user control that uses ServiceContainer to add, remove,
// and access services through a linkable service container network.
public __gc class ServiceObjectControl : public System::Windows::Forms::UserControl
{
// This example user control implementation provides a wrapper for
// ServiceContainer, supporting a linked service container network.
public:
ServiceContainer* serviceContainer;
// Parent form reference for main program function access.
private:
ServiceForm* parent;
// String for label displayed on the control to indicate the
// control's current service-related configuration state.
public:
String* label;
// The current state of the control reflecting whether it has
// obtained or provided a text service.
private:
TextServiceState state_;
public:
__property TextServiceState get_state()
{
return state_;
}
__property void set_state( TextServiceState value )
{
if( (TextServiceState)value == TextServiceState::ServiceProvided )
this->BackColor = Color::LightGreen;
else if( (TextServiceState)value == TextServiceState::ServiceNotObtained )
this->BackColor = Color::White;
else if( (TextServiceState)value == TextServiceState::ServiceObtained )
this->BackColor = Color::LightBlue;
else if( (TextServiceState)value == TextServiceState::ServiceNotFound )
this->BackColor = Color::SeaShell;
state_ = value;
}
ServiceObjectControl(ServiceObjectControl* serviceContainerParent, System::Drawing::Size size, Point ___location, ServiceForm* parent)
{
this->state_ = TextServiceState::ServiceNotObtained;
this->BackColor = Color::Beige;
this->label = String::Empty;
this->Size = size;
this->Location = ___location;
this->parent = parent;
if( serviceContainerParent == 0 )
serviceContainer = new ServiceContainer();
else
serviceContainer = new ServiceContainer(serviceContainerParent->serviceContainer);
}
// Paint method override draws the label string on the control.
protected:
void OnPaint(System::Windows::Forms::PaintEventArgs* e)
{
e->Graphics->DrawString(label, new System::Drawing::Font(S"Arial", 8), new SolidBrush(Color::Black), 5, 5);
}
// Process mouse-down behavior for click.
void OnMouseDown(System::Windows::Forms::MouseEventArgs* e)
{
if( e->Button == MouseButtons::Left )
{
if( state_ != TextServiceState::ServiceProvided )
{
// Attempt to update text from service, and set color
// state accordingly.
TextService* ts = dynamic_cast<TextService*>(serviceContainer->GetService(__typeof(TextService)));
if( ts != 0 )
{
this->label = ts->text;
state = TextServiceState::ServiceObtained;
}
else
{
this->label = S"Service Not Found";
state = TextServiceState::ServiceNotFound;
}
}
}
if( e->Button == MouseButtons::Right )
{
if( state_ == TextServiceState::ServiceProvided )
{
// Remove service if the container provided it.
if( serviceContainer->GetService(__typeof(TextService)) != 0 )
{
serviceContainer->RemoveService(__typeof(TextService), true);
state = TextServiceState::ServiceNotObtained;
this->label = S"Service Removed";
}
}
else
{
// Obtain string and provide text service.
StringInputDialog* form = new StringInputDialog(S"Test String");
form->StartPosition = FormStartPosition::CenterParent;
if( form->ShowDialog() == DialogResult::OK )
{
if( serviceContainer->GetService(__typeof(TextService)) != 0 )
serviceContainer->RemoveService(__typeof(TextService), true);
parent->ResetServiceTree(this, new EventArgs());
serviceContainer->AddService(__typeof(TextService), new TextService( form->inputTextBox->Text ), true);
state = TextServiceState::ServiceProvided;
this->label = String::Format( S"Provided Text: {0}", form->inputTextBox->Text );
}
}
}
parent->UpdateServiceCoverage();
}
// Method accesses the TextService to test the visibility of the service
// from the control, and sets the UI state accordingly.
public:
void ReflectServiceVisibility()
{
if( state_ == TextServiceState::ServiceObtained )
{
if( serviceContainer->GetService(__typeof(TextService)) == 0 )
this->BackColor = Color::CadetBlue;
}
else if( state_ != TextServiceState::ServiceProvided )
{
if( serviceContainer->GetService(__typeof(TextService)) == 0 )
{
this->BackColor = Color::White;
return;
}
// Service available.
if( state_ == TextServiceState::ServiceNotFound )
this->BackColor = Color::Khaki;
else if( state_ == TextServiceState::ServiceNotObtained && !label->Equals(S"Service Removed") )
this->BackColor = Color::Khaki;
}
}
};
void ServiceForm::CreateServiceControlTree()
{
// Create root service control.
ServiceObjectControl* control1 = new ServiceObjectControl(0, System::Drawing::Size(300, 40), Point(10, 80), this);
root = control1;
// Create first tier - pass parent with service object control 1
ServiceObjectControl* control2 = new ServiceObjectControl(control1, System::Drawing::Size(200, 30), Point(50, 160), this);
ServiceObjectControl* control3 = new ServiceObjectControl(control1, System::Drawing::Size(200, 30), Point(50, 240), this);
// Create second tier A - pass parent with service object control 2
ServiceObjectControl* control4 = new ServiceObjectControl(control2, System::Drawing::Size(180, 20), Point(300, 145), this);
ServiceObjectControl* control5 = new ServiceObjectControl(control2, System::Drawing::Size(180, 20), Point(300, 185), this);
// Create second tier B - pass parent with service object control 3
ServiceObjectControl* control6 = new ServiceObjectControl(control3, System::Drawing::Size(180, 20), Point(300, 225), this);
ServiceObjectControl* control7 = new ServiceObjectControl(control3, System::Drawing::Size(180, 20), Point(300, 265), this);
// Add controls.
Control* temp1 [] = {control1, control2, control3, control4, control5, control6, control7};
this->Controls->AddRange( temp1 );
}
void ServiceForm::ResetServiceTree(Object* /*sender*/, EventArgs* /*e*/)
{
// Remove the service from the service tree.
if( root->serviceContainer->GetService(__typeof(TextService)) != 0 )
root->serviceContainer->RemoveService(__typeof(TextService), true);
// Set all controls to "not obtained" and clear their labels.
for( int i=0; i<Controls->Count; i++ )
if( !Controls->Item[i]->Equals(reset_button) )
{
(dynamic_cast<ServiceObjectControl*>(Controls->Item[i]))->state = TextServiceState::ServiceNotObtained;
(dynamic_cast<ServiceObjectControl*>(Controls->Item[i]))->label = String::Empty;
(dynamic_cast<ServiceObjectControl*>(Controls->Item[i]))->BackColor = Color::Beige;
}
}
void ServiceForm::UpdateServiceCoverage()
{
// Have each control set state to reflect service availability.
for( int i=0; i<Controls->Count; i++ )
if( !Controls->Item[i]->Equals(reset_button) )
(dynamic_cast<ServiceObjectControl*>(Controls->Item[i]))->ReflectServiceVisibility();
}
void ServiceForm::InitializeComponent()
{
this->reset_button = new System::Windows::Forms::Button();
this->SuspendLayout();
//
// reset_button
//
this->reset_button->Location = System::Drawing::Point(392, 88);
this->reset_button->Name = S"reset_button";
this->reset_button->TabIndex = 0;
this->reset_button->TabStop = false;
this->reset_button->Text = S"Reset";
this->reset_button->Click += new System::EventHandler(this, &ServiceForm::ResetServiceTree);
//
// ServiceForm
//
this->AutoScaleBaseSize = System::Drawing::Size(5, 13);
this->ClientSize = System::Drawing::Size(512, 373);
System::Windows::Forms::Control* temp2 [] = {this->reset_button};
this->Controls->AddRange(temp2);
this->MinimumSize = System::Drawing::Size(520, 400);
this->Name = S"ServiceForm";
this->Text = S"Service Container Architecture Example";
this->ResumeLayout(false);
}
void ServiceForm::OnPaint(System::Windows::Forms::PaintEventArgs* e)
{
e->Graphics->DrawString(S"The following tree diagram represents a hierarchy of linked service containers in controls.", new System::Drawing::Font(S"Arial", 9), new SolidBrush(Color::Black), 4, 4);
e->Graphics->DrawString(S"This example demonstrates the propagation behavior of services through a linked service object tree.", new System::Drawing::Font(S"Arial", 8), new SolidBrush(Color::Black), 4, 26);
e->Graphics->DrawString(S"Right-click a component to add or replace a text service, or to remove it if the component provided it.", new System::Drawing::Font(S"Arial", 8), new SolidBrush(Color::Black), 4, 38);
e->Graphics->DrawString(S"Left-click a component to update text from the text service if available.", new System::Drawing::Font(S"Arial", 8), new SolidBrush(Color::Black), 4, 50);
// Draw lines to represent tree branches.
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 20, 125, 20, 258);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 21, 175, 45, 175);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 21, 258, 45, 258);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 255, 175, 285, 175);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 255, 258, 285, 258);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 285, 155, 285, 195);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 285, 238, 285, 278);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 285, 155, 290, 155);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 285, 195, 290, 195);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 285, 238, 290, 238);
e->Graphics->DrawLine(new Pen(new SolidBrush(Color::Black), 1), 285, 278, 290, 278);
// Draw color key.
e->Graphics->DrawRectangle(new Pen(new SolidBrush(Color::Black), 1), 20, 305, 410, 60);
int y=0;
for( int i=0; i<3; i++ )
{
e->Graphics->FillRectangle(new SolidBrush(colorkeys[y]), 25+(i*140), 310, 20, 20);
e->Graphics->DrawRectangle(new Pen(new SolidBrush(Color::Black), 1), 25+(i*140), 310, 20, 20);
e->Graphics->DrawString(keystrings[y], new System::Drawing::Font(S"Arial", 8), new SolidBrush(Color::Black), (float)50+(i*140), 315);
y++;
e->Graphics->FillRectangle(new SolidBrush(colorkeys[y]), 25+(i*140), 340, 20, 20);
e->Graphics->DrawRectangle(new Pen(new SolidBrush(Color::Black), 1), 25+(i*140), 340, 20, 20);
e->Graphics->DrawString(keystrings[y], new System::Drawing::Font(S"Arial", 8), new SolidBrush(Color::Black), (float)50+(i*140), 345);
y++;
}
}
[STAThread]
int main()
{
Application::Run(new ServiceForm());
}
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をクリックします。
必要条件
名前空間: System.ComponentModel.Design
プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ
アセンブリ: System (System.dll 内)
参照
ServiceContainer メンバ | System.ComponentModel.Design 名前空間 | IServiceProvider | IServiceContainer | ServiceCreatorCallback